| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.nifi.stateless.basics; |
| |
| import org.apache.nifi.flowfile.FlowFile; |
| import org.apache.nifi.processor.DataUnit; |
| import org.apache.nifi.flow.VersionedPort; |
| import org.apache.nifi.flow.VersionedProcessor; |
| import org.apache.nifi.stateless.StatelessSystemIT; |
| import org.apache.nifi.stateless.VersionedFlowBuilder; |
| import org.apache.nifi.stateless.config.StatelessConfigurationException; |
| import org.apache.nifi.stateless.flow.DataflowTrigger; |
| import org.apache.nifi.stateless.flow.StatelessDataflow; |
| import org.apache.nifi.stateless.flow.TransactionThresholds; |
| import org.apache.nifi.stateless.flow.TriggerResult; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.OptionalLong; |
| import java.util.concurrent.TimeUnit; |
| |
| import static junit.framework.TestCase.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| public class RequiresAdditionalInputIT extends StatelessSystemIT { |
| |
| @Test |
| public void testSourceProcessorsTriggeredAsOftenAsRequired() throws IOException, StatelessConfigurationException, InterruptedException { |
| // Build the flow |
| final int flowFileCount = 12; |
| final VersionedFlowBuilder flowBuilder = new VersionedFlowBuilder(); |
| final VersionedPort mergedPort = flowBuilder.createOutputPort("merged"); |
| final VersionedPort originalPort = flowBuilder.createOutputPort("original"); |
| |
| final VersionedProcessor generate = flowBuilder.createSimpleProcessor("GenerateFlowFile"); |
| final Map<String, String> generateProperties = new HashMap<>(); |
| generateProperties.put("Text", "abc"); |
| generate.setProperties(generateProperties); |
| |
| final VersionedProcessor merge = flowBuilder.createSimpleProcessor("ConcatenateFlowFiles"); |
| merge.setProperties(Collections.singletonMap("FlowFile Count", String.valueOf(flowFileCount))); |
| |
| flowBuilder.createConnection(generate, merge, "success"); |
| flowBuilder.createConnection(merge, mergedPort, "merged"); |
| flowBuilder.createConnection(merge, originalPort, "original"); |
| |
| // If allowing only a single FlowFile, we expect the dataflow to timeout. |
| final StatelessDataflow timeoutDataflow = loadDataflow(flowBuilder.getFlowSnapshot(), Collections.emptyList(), |
| Collections.emptySet(), TransactionThresholds.SINGLE_FLOWFILE); |
| |
| final DataflowTrigger timeoutTrigger = timeoutDataflow.trigger(); |
| final Optional<TriggerResult> optionalResult = timeoutTrigger.getResult(1, TimeUnit.SECONDS); |
| assertFalse(optionalResult.isPresent()); |
| |
| // Startup the dataflow allowing a Transaction Threshold large enough to accommodate |
| final StatelessDataflow dataflow = loadDataflow(flowBuilder.getFlowSnapshot(), Collections.emptyList(), Collections.emptySet(), createTransactionThresholds(flowFileCount)); |
| |
| // Enqueue data and trigger |
| final DataflowTrigger trigger = dataflow.trigger(); |
| final TriggerResult result = trigger.getResult(); |
| assertTrue(result.isSuccessful()); |
| |
| final List<FlowFile> mergedFlowFiles = result.getOutputFlowFiles().get("merged"); |
| assertEquals(1, mergedFlowFiles.size()); |
| |
| final List<FlowFile> originalFlowFiles = result.getOutputFlowFiles().get("original"); |
| assertEquals(flowFileCount, originalFlowFiles.size()); |
| |
| final String outputText = new String(result.readContentAsByteArray(mergedFlowFiles.get(0))); |
| final StringBuilder expectedTextBuilder = new StringBuilder(); |
| for (int i=0; i < flowFileCount; i++) { |
| expectedTextBuilder.append("abc"); |
| } |
| |
| final String expectedText = expectedTextBuilder.toString(); |
| assertEquals(expectedText, outputText); |
| |
| result.acknowledge(); |
| } |
| |
| @Test |
| public void testMultipleLayersOfAdditionalFlowFilesRequired() throws IOException, StatelessConfigurationException, InterruptedException { |
| // Build the flow |
| final VersionedFlowBuilder flowBuilder = new VersionedFlowBuilder(); |
| final VersionedPort outPort = flowBuilder.createOutputPort("out"); |
| |
| final VersionedProcessor generate = flowBuilder.createSimpleProcessor("GenerateFlowFile"); |
| final Map<String, String> generateProperties = new HashMap<>(); |
| generateProperties.put("Text", "abc"); |
| generate.setProperties(generateProperties); |
| |
| final VersionedProcessor levelOne = flowBuilder.createSimpleProcessor("ConcatenateFlowFiles"); |
| levelOne.setProperties(Collections.singletonMap("FlowFile Count", "3")); |
| levelOne.setAutoTerminatedRelationships(Collections.singleton("original")); |
| levelOne.setName("Level 1"); |
| |
| final VersionedProcessor levelTwo = flowBuilder.createSimpleProcessor("ConcatenateFlowFiles"); |
| levelTwo.setProperties(Collections.singletonMap("FlowFile Count", "2")); |
| levelTwo.setAutoTerminatedRelationships(Collections.singleton("original")); |
| levelTwo.setName("Level 2"); |
| |
| final VersionedProcessor levelThree = flowBuilder.createSimpleProcessor("ConcatenateFlowFiles"); |
| levelThree.setProperties(Collections.singletonMap("FlowFile Count", "6")); |
| levelThree.setAutoTerminatedRelationships(Collections.singleton("original")); |
| levelThree.setName("Level 3"); |
| |
| flowBuilder.createConnection(generate, levelOne, "success"); |
| flowBuilder.createConnection(levelOne, levelTwo, "merged"); |
| flowBuilder.createConnection(levelTwo, levelThree, "merged"); |
| flowBuilder.createConnection(levelThree, outPort, "merged"); |
| |
| // If allowing only a single FlowFile, we expect the dataflow to timeout. |
| final StatelessDataflow timeoutDataflow = loadDataflow(flowBuilder.getFlowSnapshot(), Collections.emptyList(), |
| Collections.emptySet(), TransactionThresholds.SINGLE_FLOWFILE); |
| |
| final DataflowTrigger timeoutTrigger = timeoutDataflow.trigger(); |
| final Optional<TriggerResult> optionalResult = timeoutTrigger.getResult(1, TimeUnit.SECONDS); |
| assertFalse(optionalResult.isPresent()); |
| |
| // Startup the dataflow allowing a Transaction Threshold large enough to accommodate |
| final StatelessDataflow dataflow = loadDataflow(flowBuilder.getFlowSnapshot(), Collections.emptyList(), Collections.emptySet(), createTransactionThresholds(36)); |
| |
| // Enqueue data and trigger |
| final DataflowTrigger trigger = dataflow.trigger(); |
| final TriggerResult result = trigger.getResult(); |
| assertTrue(result.isSuccessful()); |
| |
| final List<FlowFile> mergedFlowFiles = result.getOutputFlowFiles().get("out"); |
| assertEquals(1, mergedFlowFiles.size()); |
| |
| final String outputText = new String(result.readContentAsByteArray(mergedFlowFiles.get(0))); |
| final StringBuilder expectedTextBuilder = new StringBuilder(); |
| for (int i=0; i < 36; i++) { |
| expectedTextBuilder.append("abc"); |
| } |
| |
| final String expectedText = expectedTextBuilder.toString(); |
| assertEquals(expectedText, outputText); |
| |
| result.acknowledge(); |
| } |
| |
| private TransactionThresholds createTransactionThresholds(final int maxFlowFiles) { |
| return new TransactionThresholds() { |
| @Override |
| public OptionalLong getMaxFlowFiles() { |
| return OptionalLong.of(maxFlowFiles); |
| } |
| |
| @Override |
| public OptionalLong getMaxContentSize(final DataUnit dataUnit) { |
| return OptionalLong.empty(); |
| } |
| |
| @Override |
| public OptionalLong getMaxTime(final TimeUnit timeUnit) { |
| return OptionalLong.empty(); |
| } |
| }; |
| } |
| } |